Sealing gas source device of liquid argon pump

Abstract

The invention relates to the field of liquid argon pump sealing, in particular to a liquid argon pump sealing gas source device which comprises an argon product pipeline, a gas outlet hole is formed in the argon product pipeline, a plug connected through a fastening unit is arranged at the position of the gas outlet hole, the plug is connected with a gas conveying pipe, a stop valve is installed on the gas conveying pipe, and the gas outlet end of the gas conveying pipe is branched into two branch pipes. A pressure reducing valve is mounted on each branch pipe, and the gas outlet end of each pressure reducing valve is led to the crude liquid argon pump through pipeline welding; in the invention, the pressure of the product argon is reduced from 1.8-2.5 MPa to less than 0.5 MPa, the product argon is used as a sealing gas source for continuous and stable output of the crude liquid argon pump M, the sealing gas of the crude liquid argon pump M is prevented from leaking inwards to pollute the product, meanwhile, after the pressure-reduced product argon is used as the sealing gas source, when the crude liquid argon pump M is put into operation at the initial stage or breaks down, the purity of the pure argon product can be prevented from being damaged, and the production efficiency is improved. And moreover, the argon adjusting time of the argon tower at the initial stage is shortened, the quality of a pure argon product is stably improved, the product quality is ensured, and the product competitiveness is improved.

Description

Technical Field

[0001] The invention relates to the technical field of liquid argon pump sealing, in particular to a liquid argon pump sealing gas source device. Background Art

[0002] Air separation equipment uses air as raw material, converts air into liquid through compression cycle deep freezing, and then gradually separates and produces inert gases such as oxygen, nitrogen and argon from the liquid air through distillation.

[0003] The crude liquid argon pump used in the air separation equipment adopts a single-stage centrifugal pump. In order to prevent the cryogenic liquid from leaking along the main shaft, that is, the cryogenic liquid leaks along the rotating shaft surface of the crude liquid argon pump, the rotating shaft seal is currently generally sealed by an inflatable labyrinth seal, and the air source used for the seal is instrument air. In general chemical companies, instrument air refers to the driving air source for pneumatic actuators (actuators and cylinders of pneumatic valves, etc.).

[0004] In actual use, the following shortcomings are found in instrument air. When the crude liquid argon pump is started at the initial stage, or there are problems such as cavitation and sealing gas leakage during the operation of the crude liquid argon pump, the instrument air will flow into the crude liquid argon along the surface of the shaft, contaminating the liquid argon and affecting the quality of the liquid argon product. This will cause the product to fail to meet the standards for a long time, or the product quality will decline and fail to meet the purity requirements of refined argon, affecting the export of liquid argon. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art that air may penetrate into the crude liquid argon along the surface of the rotating shaft, thereby contaminating the liquid argon.

[0006] In order to solve the above technical problems, the present invention provides a sealed gas source device for a liquid argon pump, comprising an argon product pipeline, an air outlet hole being opened on the argon product pipeline, a plug connected by a fastening unit being provided at the air outlet hole, the plug being connected to an air supply pipe, a stop valve being installed on the air supply pipe, the air outlet end of the air supply pipe being forked into two branch pipes, each branch pipe being installed with a pressure reducing valve, and the air outlet end of the pressure reducing valve being led to a crude liquid argon pump through pipeline welding.

[0007] In one embodiment of the present invention, the fastening unit is used to fasten and seal the plug in the gas outlet on the argon product pipeline, and the fastening unit includes a fastening plate arranged in half, one end of each fastening plate is in an arc shape, and one end edge of the two fastening plates are rotatably connected together, and the other ends of the two fastening plates are vertically bent inward to form an anti-slip portion, and a plurality of fastening bolts are threadedly connected on the outer end surface of the anti-slip portion, and a plug is arranged between the two fastening plates;

[0008] The plug includes an insert tube, one end of which is reduced in diameter, and a truncated cone-shaped rubber ring is sleeved on the reduced diameter portion of the insert tube. One end of the insert tube is inserted into the air outlet through the rubber ring, and the outer ring of the other end of the insert tube is provided with a disk body that matches the anti-slip portion, the disk body is placed on the inner side of the anti-slip portion, and the end of the fastening bolt passes through the anti-slip portion and presses against the disk body.

[0009] In one embodiment of the present invention, a plurality of push rods are provided on the inner side walls of the two fastening plates, the ends of the push rods are in an arc shape, and the ends of the push rods are squeezed and half-wrapped on the surface of the insertion tube;

[0010] The outer side walls of the two fastening plates are provided with ring-shaped clamps, which are sleeved on the fastening plates.

[0011] In one embodiment of the present invention, a window is provided in the middle of the two fastening plates, an extrusion plate is passed through the two windows, both ends of the extrusion plate pass through the windows and extend to the outer circle of one end of the fastening plate, a through hole is provided in the middle of the extrusion plate, a plurality of slide grooves are provided in the inner circle of the through hole, and a plurality of bayonet holes are provided on the inner side wall of the extrusion plate;

[0012] A plurality of clamping blocks are arranged on the outer ring of one end of the insert tube, one end of the insert tube is inserted into the air outlet along the through hole, the clamping block slides into the inner wall position of the extrusion plate along the slide groove, and is rotated and embedded in the clamping port.

[0013] In one embodiment of the present invention, an outer circle of a reduced diameter portion at one end of the cannula is threadedly connected with an extrusion ring, a ring body is provided between the extrusion ring and the rubber ring, and the extrusion ring can squeeze the ring body onto the rubber ring.

[0014] In one embodiment of the present invention, a pre-installed component is provided above the fastening unit, and the pre-installed component is used to pre-fix the fastening unit at the air outlet position, and the pre-installed component includes a clamp made of elastic material, bolts penetrate through both ends of the clamp, and a vertical plate is provided on the back of the clamp, and the lower end of the vertical plate is fixedly connected to the horizontal plate, and the lower surfaces of both ends of the horizontal plate are provided with insertion rods, and the insertion rods are inserted in the sleeves provided on the upper surface of the fastening plate.

[0015] In one embodiment of the present invention, the insertion rod is rotatably connected to the horizontal plate, and a protrusion is provided at the end of the insertion rod;

[0016] A sliding opening is arranged on the inner side wall of the sleeve, and the sliding opening is arranged along the axial direction of the sleeve. The protrusion is embedded in the sliding opening, and the insertion rod is inserted into the sleeve.

[0017] In one embodiment of the present invention, notches are provided on the upper edges of both ends of the clamp, and limiting blocks are provided in the two notches, and the limiting blocks are used to limit the distance between the two ends of the clamp.

[0018] In one embodiment of the present invention, a plurality of fixing holes are provided on the end surface of the disc body opposite to the fastening bolts.

[0019] In one embodiment of the present invention, the two sides of the clamp are rotatably connected with adjusting bolts, the ends of the adjusting bolts penetrate into the inner side of the clamp and are rotatably connected with an arc plate;

[0020] Each of the arc-shaped plates is provided with protrusions on the upper and lower edges;

[0021] The outer side walls at the other ends of the two fastening plates are provided with guide grooves symmetrically arranged up and down, and the ends of the guide grooves are provided with recesses adapted to the protrusions.

[0022] The present invention is beneficial in that:

[0023] 1. In the present invention, the medium-pressure argon delivery pipeline system near the air separation equipment is used to inject the argon product gas into the crude liquid argon pump M along the gap between the rotating shaft and the sealing ring, and the original air instrument gas source and the sealing ring connection are cut off and completely isolated to avoid gas blowby. After the product argon is used as the sealing gas source, the quality control index of the refined argon product is that the oxygen content in the liquid argon is ≤3ppm, and the nitrogen and other impurities are ≤2ppm or less, which has achieved good results and improved the product competitiveness.

[0024] 2. In the present invention, the pressure of product argon is reduced from 1.8-2.5MPa to less than 0.5MPa to serve as the sealing gas source for the continuous and stable output of the crude liquid argon pump M, so as to prevent the sealing gas of the crude liquid argon pump M from leaking and contaminating the product. At the same time, after the reduced pressure product argon is used as the sealing gas source, the purity of the refined argon product can be prevented from being damaged when the crude liquid argon pump M is initially put into operation or encounters a fault, and the initial argon tower argon adjustment time is accelerated, the quality of the refined argon product is stably improved, the product quality is ensured, and the product competitiveness is improved.

[0025] 3. In the present invention, the designed fastening unit can flexibly install the plug at the air outlet position, and compared with the welding method, the designed fastening unit cooperates with the plug, and both disassembly and installation are convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0027] Figure 1 It is a schematic diagram of the arrangement of the sealing gas source device of the liquid argon pump in the present invention;

[0028] Figure 2 This is a schematic diagram of the cooperation between the sealing ring and the rotating shaft of the crude liquid argon pump;

[0029] Figure 3 This is a first-view stereoscopic diagram of the cooperation between the argon product pipeline and the fastening unit in the present invention;

[0030] Figure 4 A second perspective perspective view of the cooperation between the argon product pipeline and the fastening unit in the present invention;

[0031] Figure 5 This is a front view of the cooperation between the argon product pipeline and the fastening unit in the present invention;

[0032] Figure 6 It is a top view of the cooperation between the argon product pipeline and the fastening unit in the present invention;

[0033] Figure 7 It is a stereoscopic diagram of the cooperation between the cannula and the argon product pipeline in the present invention;

[0034] Figure 8 It is a schematic diagram of the cooperation between the intubation tube and the air outlet in the present invention;

[0035] Fig. 9 is a three-dimensional diagram of the plug of the present invention;

[0036] Fig.10 It is a schematic diagram of the matching between the plug and the extrusion plate in the present invention;

[0037] Fig.11 is a three-dimensional diagram of an extruded plate in the present invention;

[0038] Fig.12 A three-dimensional diagram of the cooperation between the pre-installed component and the fastening plate in the present invention;

[0039] Fig.13 It is a three-dimensional diagram of the clamp in the present invention;

[0040] Fig.14 is a three-dimensional diagram of a fastening plate in the present invention;

[0041] Fig.15 It is a three-dimensional diagram of the fastening plate and the plug in the present invention;

[0042] Fig.16 It is a three-dimensional diagram of the clamp in the present invention.

[0043] In the figure: A, crude argon II tower; B, crude argon I tower; M, crude liquid argon pump; 1, argon product pipeline; 2, air outlet; 3, plug; 4, gas pipeline; 5, stop valve; 6, branch pipe; 7, pressure reducing valve; 8, sealing ring; 9, rotating shaft; 10, fastening plate; 11, anti-slip part; 12, fastening bolt; 13, insert; 14, rubber ring; 15, disk; 16, ejector rod; 17, clamp; 18, window; 19, extrusion Plate; 20, through hole; 21, slide groove; 22, bayonet; 23, block; 24, fixing ear; 25, extrusion ring; 26, ring body; 27, hoop; 28, vertical plate; 29, horizontal plate; 30, plug rod; 31, sleeve; 32, convex block; 33, slide mouth; 34, notch; 35, limit block; 36, fixing hole; 37, adjusting bolt; 38, arc plate; 39, protrusion; 40, guide groove; 41, notch. DETAILED DESCRIPTION

[0044] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0045] Reference Figure 1 - Fig. 9 A sealed gas source device for a liquid argon pump comprises an argon product pipeline 1, an air outlet 2 is provided on the argon product pipeline 1, a plug 3 connected by a fastening unit is provided at the position of the air outlet 2, the plug 3 is connected to a gas pipeline 4, a stop valve 5 is installed on the gas pipeline 4, the gas outlet end of the gas pipeline 4 is bifurcated into two branch pipes 6, each branch pipe 6 is installed with a pressure reducing valve 7, and the gas outlet end of the pressure reducing valve 7 is led to a crude liquid argon pump through pipeline welding;

[0046] In this embodiment, the crude liquid argon pump M is used in the air separation equipment to send the crude liquid argon at the bottom of the crude argon II column A to the upper part of the crude argon I column B as the reflux liquid of the crude argon I column B, and to exchange heat and mass with the gaseous argon fraction drawn from the upper tower of the crude argon I column B on each tray of the crude argon I column B to achieve the preliminary binary separation of oxygen and argon. Figure 1 As shown, the crude liquid argon in the crude argon II column A is sent to the crude argon I column B through the crude liquid argon pump M;

[0047] Using the medium-pressure argon delivery pipeline system near the air separation equipment, a plug 3 is installed on one of the argon product pipelines 1 in the medium-pressure argon delivery pipeline system. The plug 3 is connected to the inflatable labyrinth seal 8 at the rotating shaft 9 of the crude liquid argon pump M through the gas pipeline 4. Figure 2 As shown, the argon product gas is injected into the crude liquid argon pump M along the gap between the rotating shaft 9 and the sealing ring 8, and the connection between the original air instrument gas source and the sealing ring 8 is completely cut off to avoid gas cross-talk. After the product argon is used as the sealing gas source, the quality control index of the refined argon product is that the oxygen content in the liquid argon is ≤3ppm, and the nitrogen and other impurities are ≤2ppm or less, which has achieved good results and improved the product competitiveness.

[0048] The pressure reducing valve 7 installed on the argon product pipe adopts an oxygen pressure reducing valve 7. The oxygen pressure reducing valve 7 has high pressure reducing accuracy, strong stability, and a pressure reducing range of 0.1MPa-1MPa. It can reduce the pressure of the product argon from 1.8-2.5MPa to less than 0.5MPa to serve as a sealing gas source for the continuous and stable output of the crude liquid argon pump M, thereby preventing the crude liquid argon pump M from leaking and contaminating the product. At the same time, after using the reduced pressure product argon as the sealing gas source, when the crude liquid argon pump M is initially put into operation or encounters a fault, it can also avoid the purity of the refined argon product from being damaged, and accelerate the initial argon tower argon adjustment time. The quality of the refined argon product has been steadily improved, ensuring the product quality and improving the product competitiveness.

[0049] Reference Figure 1 - Fig. 9The fastening unit is used to fasten and seal the plug 3 in the gas outlet 2 on the argon product pipeline 1, and the fastening unit includes a fastening plate 10 arranged in half, one end of each fastening plate 10 is in an arc shape, and the edges of one end of the two fastening plates 10 are connected together by rotation, and the other ends of the two fastening plates 10 are vertically bent inward to form an anti-slip portion 11, and a plurality of fastening bolts 12 are threadedly connected on the outer end surface of the anti-slip portion 11, and the plug 3 is arranged between the two fastening plates 10;

[0050] The plug 3 includes an insert tube 13, one end of which is reduced in diameter, and a truncated cone-shaped rubber ring 14 is sleeved on the reduced diameter portion of the insert tube 13. One end of the insert tube 13 is inserted into the air outlet 2 through the rubber ring 14, and the other end of the insert tube 13 is provided with a disc 15 that matches the anti-detachment part 11 on the outer ring, and the disc 15 is placed on the inner side of the anti-detachment part 11, and the end of the fastening bolt 12 passes through the anti-detachment part 11 and presses on the disc 15;

[0051] The argon product is transported to the rotating shaft 9 in the crude liquid argon pump M, and can be directly welded to the position of the air outlet 2 on the argon product pipeline 1 through a stainless steel pipe or a copper pipe, and then the stainless steel pipe or the copper pipe is arranged and extended to the crude liquid argon pump M to realize the transportation of the argon product. This method is simple and easy to operate. However, the liquid argon pump sealing gas source device designed in this embodiment is an improved solution after the air separation equipment is arranged, and a suitable air outlet 2 is located on the argon product pipeline 1, which is not in the air separation equipment arrangement plan. Therefore, there is a situation where the position of the air outlet 2 on the argon product pipeline 1 is not suitable, such as affecting the arrangement of the delivery pipeline route itself, or the delivery pipeline arrangement affects the arrangement of other pipelines, and many other problems. For this purpose, an easily detachable plug 3 is provided, and the plug 3 is installed on the argon product pipeline 1 in conjunction with the fastening unit. After the plug 3 is fixedly installed, if it is found that it affects the subsequent arrangement of other pipelines, the plug 3 can be directly removed and a stainless steel plug or a copper plug can be welded to the original air outlet 2;

[0052] The fastening unit designed in this embodiment cooperates with the plug 3 in the following specific operations: first, one end of the two fastening plates 10 is wrapped on the argon product pipeline 1, and one end of the two fastening plates 10 is connected together by rotation through a torsion spring, and the torsion force of the torsion spring forces the two fastening plates 10 to move closer to each other and clamp on the argon product pipeline 1, and then one end of the plug 3 is inserted into the air outlet 2 in cooperation with the rubber ring 14, and at the same time, the disc body 15 is pressed against the inner side wall of the anti-slip portion 11, and then the fastening bolt 12 is rotated, and the end of the fastening bolt 12 is pressed against the disc body 15, and the fastening bolt 12 applies a squeezing force to the disc body 15, and the disc body 15 applies a squeezing force to the insert tube 13, so that the insert tube 13 squeezes the sealing ring 8 and seals the insert tube 13 and the air outlet 2;

[0053] In the subsequent discovery that the position of the vent hole 2 will affect the arrangement of the delivery pipe, the fastening bolts 12 can be loosened to remove the fastening plate 10 and the plug 3 from the argon product pipeline 1. Compared with the welding method, the fastening unit designed in this embodiment cooperates with the plug 3, and both disassembly and installation are convenient.

[0054] Reference Figure 1 - Fig. 9 A plurality of push rods 16 are provided on the inner side walls of the two fastening plates 10, and the ends of the push rods 16 are arc-shaped, and the ends of the push rods 16 are squeezed and half-wrapped on the surface of the insertion tube 13;

[0055] A ring-shaped clamp 17 is provided on the outer side wall of the two fastening plates 10, and the clamp 17 is sleeved on the fastening plates 10;

[0056] A ring-shaped clamp 17 is provided on the fastening plate 10, and the clamp 17 is sleeved on the two fastening plates 10, so that the two fastening plates 10 are squeezed together, and at the same time, the inner side of the fastening plate 10 is squeezed on the outer ring of the disk body 15, so as to improve the stability between the fastening plate 10 and the disk body 15, and a push rod 16 is provided between the two fastening plates 10, and the end of the push rod 16 is wrapped and squeezed on the surface of the insert tube 13, so that the insert tube 13 is centered between the two fastening plates 10, so that the axes of the insert tube 13 and the air outlet 2 are on the same line, which helps the rubber ring 14 to fit tightly on the inner wall of the air outlet 2, and improves the sealing between the plug 3 and the air outlet 2.

[0057] Reference Figure 1 - Fig.12 A window 18 is provided in the middle of the two fastening plates 10, an extrusion plate 19 is passed through the two windows 18, both ends of the extrusion plate 19 pass through the windows 18 and extend to the outer circle of one end of the fastening plate 10, a through hole 20 is provided in the middle of the extrusion plate 19, a plurality of slide grooves 21 are provided in the inner circle of the through hole 20, and a plurality of bayonet holes 22 are provided on the inner side wall of the extrusion plate 19;

[0058] A plurality of blocks 23 are provided on the outer ring of one end of the insert tube 13. One end of the insert tube 13 is inserted into the air outlet 2 along the through hole 20. The blocks 23 slide into the inner wall of the extrusion plate 19 along the slide groove 21 and are rotated and embedded in the bayonet 22.

[0059] Considering that the pressure range of product argon is 1.8-2.5MPa, in order to enable the insert tube 13 to cooperate with the gas outlet 2 to resist higher pressure, an extrusion plate 19 is provided on the two fastening plates 10, and the two ends of the extrusion plate 19 extend from the inner side of the fastening plate 10 through the window 18 to the outer circle position of the fastening plate 10;

[0060] When installing the fastening plate 10 and the extrusion plate 19, firstly, one end of the insert tube 13 is passed through the through hole 20, and the block 23 is moved along the slide groove 21. When the block 23 is separated from the slide groove 21, the insert tube 13 is rotated and the insert tube 13 is pulled back so that the block 23 is embedded in the bayonet 22. At this time, the insert tube 13 is connected with the extrusion plate 19. Then, the fastening plate 10 is installed, and the two fastening plates 10 are unfolded and sleeved on the argon product pipeline 1. Then, the two ends of the extrusion plate 19 are inserted into the window 18, and at the same time, one end of the insert tube 13 is inserted into the gas outlet 2. At this time, the extrusion plate 19 and the two fastening plates 10 are wrapped together on the argon product pipeline 1;

[0061] Bolt holes are provided at both ends of the extrusion plate 19, and fixing ears 24 are provided on the outer rings of one end of the two fastening plates 10. Bolt holes are also provided on the fixing ears 24, and the extrusion plate 19 is fixed to the fixing ears 24 by means of bolts and nuts. While being fixed, the middle part of the extrusion plate 19 squeezes the insert tube 13 toward the axial direction of the argon product pipeline 1, and further squeezes the rubber ring 14 out of the position of the air hole 2, thereby improving the sealing between the plug 3 and the argon product pipeline 1, and being able to withstand the higher pressure of the product argon.

[0062] Reference Figure 1 - Fig.11 The outer circle of the reduced diameter portion of one end of the cannula 13 is threadedly connected with an extrusion ring 25, and a ring body 26 is provided between the extrusion ring 25 and the rubber ring 14, and the extrusion ring 25 can squeeze the ring body 26 onto the rubber ring 14;

[0063] When the cannula 13 squeezes the sealing ring 8 into the air outlet 2, the rubber ring 14 will be squeezed and deformed, thereby achieving gas sealing, and the outer edge of the rubber ring 14 will protrude toward the outer shape of the air outlet 2, which has an adverse effect on the sealing between the air outlet 2 and the cannula 13. For this purpose, an extrusion ring 25 and a ring body 26 are provided. The extrusion ring 25 cooperates with the reduced diameter part of the cannula 13 and the nut to rotate in the same principle as the bolt. The extrusion ring 25 is rotated and moves toward the air outlet 2. At the same time, the extrusion ring 25 squeezes the ring 25 body, and then the ring body 26 is squeezed on the outer edge of the rubber ring 14 to restrict the extrusion deformation of the rubber ring 14. At the same time, the surface of the ring body 26 opposite to the rubber ring 14 is in an arc shape, which can tightly fit and squeeze the rubber ring 14 on the argon product pipeline 1;

[0064] The purpose of the fixed seal between the plug 3 and the air outlet 2 is to prevent argon from leaking from the air outlet 2, resulting in failure to input argon of a specified pressure into the delivery pipe, thereby affecting the sealing between the subsequent rotating shaft 9 and the labyrinth seal 8.

[0065] Reference Figure 3 - Fig.13A pre-installed component is provided above the fastening unit, and the pre-installed component is used to pre-fix the fastening unit at the position of the air outlet 2, and the pre-installed component includes a clamp 27 made of elastic material, and bolts are passed through both ends of the clamp 27. A vertical plate 28 is provided on the back of the clamp 27, and the lower end of the vertical plate 28 is fixed to a horizontal plate 29. The lower surfaces of both ends of the horizontal plate 29 are provided with plug rods 30, and the plug rods 30 are inserted into sleeves 31 provided on the upper surface of the fastening plate 10;

[0066] Before installing the fastening unit, first install the pre-installed component, which is used to guide the plug 3 to be inserted into the air outlet 2. The specific operation is to pre-fasten the clamp 27 on the argon product pipeline 1 by means of bolts and nuts, and position it above the air outlet 2, then rotate the clamp 27 so that the middle position of the two ends of the clamp 27 is placed above the air outlet 2, and then make the final tightening of the bolts and nuts. At this time, the clamp 27 is fixed to the argon product pipeline 1, and then the fastening unit is installed. The insert 13 is installed on the extrusion plate 19, and the unfolded fastening plate 10 is attached to the argon product pipeline 1. Then, the two ends of the extrusion plate 19 are inserted into the window 18, and the two fastening plates 10 are merged, and then the fastening plate 10 is pushed up with force so that the two sleeves 31 on the upper edge of one end of the fastening plate 10 are respectively sleeved on the insertion rod 30. At this time, the relative position between the fastening plate 10 and the argon product pipeline 1 Rotational constraint, at this time, the middle part of the extrusion plate 19 is opposite to the air outlet 2, that is, one end of the insert tube 13 is opposite to the air outlet 2, tighten the bolts and nuts between the end of the extrusion plate 19 and the fixing ear 24, so that the insert tube 13 can be smoothly inserted along the axis of the air outlet 2, to ensure that when the insert tube 13 and the air outlet 2 are plugged in, the axes of the insert tube 13 and the air outlet 2 tend to be on the same axis, thereby improving the matching accuracy of the rubber ring 14 and the air outlet 2. Not only that, it can also improve the effect of the plug 3 itself in resisting external extrusion force. For example, the other end of the plug 3 has been connected to a conveying pipe, and the conveying pipe itself has rigidity. The conveying pipe causes the plug 3 to deviate to the side of the air outlet 2. At this time, the rotation between the fastening plate 10 and the argon product pipeline 1 can be constrained by pre-installing the assembly, that is, the offset between the plug 3 and the air outlet 2 is constrained, which facilitates the installation between the plug 3 and the argon product pipeline 1.

[0067] Reference Figure 3 - Fig.15 The insertion rod 30 is rotatably connected to the horizontal plate 29, and a protrusion 32 is provided at the end of the insertion rod 30;

[0068] The inner wall of the sleeve 31 is provided with a sliding opening 33, which is provided along the axis direction of the sleeve 31, the protrusion 32 is embedded in the sliding opening 33, and the insertion rod 30 is inserted into the sleeve 31;

[0069] Before the insertion rod 30 is inserted into the sleeve 31, the insertion rod 30 is rotated so that the protrusion 32 is opposite to the upper edge of the sliding opening 33 on the inner wall of the sleeve 31, and then the fastening plate 10 is pressed upward, and the insertion rod 30 is inserted into the sleeve 31. The protrusion 32 slides in along the sliding opening 33. When the protrusion 32 is placed at the lower end of the sleeve 31, it means that the sleeve 31 and the insertion rod 30 are connected. The insertion rod 30 is rotated again to make the protrusion 39 away from the sliding opening 33. The protrusion 39 constrains the sleeve 31 in the vertical direction, thereby constraining the fastening plate 10 in the axial direction of the argon product pipeline 1. The constraint of the fastening plate 10 again also constrains the plug 3 and the air outlet 2 in the vertical direction.

[0070] Reference Figure 3 - Fig.15 The upper edges of both ends of the clamp 27 are provided with notches 34, and the two notches 34 are provided with limit blocks 35, which are used to limit the distance between the two ends of the clamp 27;

[0071] Limit blocks 35 are set at both ends of the clamp 27, and bolts pass through the limit blocks 35. The limit blocks 35 are used to constrain the distance between the two ends of the clamp 27 to prevent the two ends of the clamp 27 from being squeezed and damaged during the tightening of the bolts and nuts. In this embodiment, after the installation of the plug 3 and the argon product pipeline 1 is completed, the pre-installed component can be removed, and then the plug 3 can be installed in conjunction with the next fastening unit to achieve the recycling of the pre-installed component.

[0072] Reference Figure 3 - Figure 7 , a plurality of fixing holes 36 are provided on the end surface of the plate body 15 opposite to the fastening bolts 12;

[0073] When the fastening bolt 12 is tightened, the end of the fastening bolt 12 is embedded in the fixing hole 36, which can constrain the relative displacement between the disk body 15 and the anti-drop plate, and is also a way to improve the stability between the plug 3 and the fastening plate 10.

[0074] Reference Figure 3 - Fig.16 , the two sides of the clamp 17 are rotatably connected with adjusting bolts 37, the ends of the adjusting bolts 37 penetrate into the inner side of the clamp 17, and are rotatably connected with an arc plate 38;

[0075] Each of the arc-shaped plates 38 has protrusions 39 on its upper and lower edges;

[0076] The outer side walls of the other ends of the two fastening plates 10 are provided with guide grooves 40 symmetrically arranged in the upper and lower directions, and the ends of the guide grooves 40 are provided with recesses 41 adapted to the protrusions 39;

[0077] The adjusting bolt 37 is used for fastening the two fastening plates 10. When installing the clamp 17, the adjusting thread is rotated to drive the arc plate 38 to adhere to the inner surface of the clamp 17, and then the clamp 17 is installed. The protrusion 39 on the arc plate 38 slides along the guide groove 40, and the guide groove 40 guides the protrusion 39 and guides the arc plate 38 to the middle position of the outer side of the fastening plate 10. Then the protrusion 39 is embedded in the recess 41 to constrain the relative sliding between the clamp 17 and the fastening plate 10. Then the adjusting bolt 37 is rotated to squeeze the arc plate 38. The arc plate 38 squeezes the two fastening plates 10 closer to each other, so that the fastening plate 10 can clamp plugs 3 of different specifications and sizes, thereby improving the flexibility and adaptability of the fastening unit.

[0078] Working principle:

[0079] First, install the pre-installed components, and pre-fasten the clamp 27 on the argon product pipeline 1 by means of bolts and nuts, and place it above the gas outlet 2. Then rotate the clamp 27 so that the middle position of both ends of the clamp 27 is placed above the gas outlet 2, and then finally fasten the bolts and nuts. At this time, the clamp 27 is fixed to the argon product pipeline 1;

[0080] Then install the fastening unit, install the insert 13 on the extrusion plate 19, and attach the unfolded fastening plate 10 to the argon product pipeline 1. Then, insert the two ends of the extrusion plate 19 into the window 18, and merge the two fastening plates 10. Then, push up the fastening plate 10 with force, so that the two sleeves 31 on the upper edge of one end of the fastening plate 10 are respectively sleeved on the insertion rod 30. At this time, the relative rotation constraint between the fastening plate 10 and the argon product pipeline 1 is achieved. At this time, the middle part of the extrusion plate 19 is opposite to the air outlet 2, that is, one end of the insert 13 is opposite to the air outlet 2. Tighten the bolts and nuts between the end of the extrusion plate 19 and the fixing ear 24, so that the insert 13 is smoothly inserted along the axis of the air outlet 2, and ensure that when the insert 13 and the air outlet 2 are plugged in, the axes of the insert 13 and the air outlet 2 tend to be on the same axis, so as to improve the matching accuracy of the rubber ring 14 and the air outlet 2.

[0081] Then, the clamp 17 is installed, and the protrusion 39 on the arc plate 38 slides along the guide groove 40. The guide groove 40 guides the protrusion 39 and guides the arc plate 38 to the middle position of the outer side of the fastening plate 10. Then, the protrusion 39 is embedded in the recess 41 to restrict the relative sliding between the clamp 17 and the fastening plate 10. Then, the adjusting bolt 37 is rotated, and the adjusting bolt 37 squeezes the arc plate 38. The arc plate 38 squeezes the two fastening plates 10 to be close to each other and fixed together.

[0082] Finally, remove the pre-assembled assembly, loosen the bolts and nuts on the clamp 27, rotate the rod 30 so that the protrusion 32 is opposite to the upper edge of the sliding opening 33 on the inner wall of the sleeve 31, and then squeeze the clamp 27 upward, the rod 30 is separated from the sleeve 31, and the clamp 27 is removed.

[0083] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A liquid argon pump sealed gas source device, characterized in that: The invention comprises an argon product pipeline (1), wherein an air outlet (2) is provided on the argon product pipeline (1), a plug (3) connected via a fastening unit is provided at the position of the air outlet (2), the plug (3) is connected to a gas transmission pipe (4), a stop valve (5) is installed on the gas transmission pipe (4), the air outlet end of the gas transmission pipe (4) is bifurcated into two branch pipes (6), each branch pipe (6) is installed with a pressure reducing valve (7), and the air outlet end of the pressure reducing valve (7) is led to a crude liquid argon pump via pipeline welding.

2. A liquid argon pump sealed gas source device according to claim 1, characterized in that: The fastening unit is used to fasten and seal the plug (3) in the gas outlet (2) on the argon product pipeline (1), and the fastening unit comprises a fastening plate (10) arranged in half, one end of each fastening plate (10) is in an arc shape, and one end edge of the two fastening plates (10) are rotatably connected together, and the other ends of the two fastening plates (10) are vertically bent inward to form an anti-slip portion (11), and a plurality of fastening bolts (12) are threadedly connected on the outer end surface of the anti-slip portion (11), and the plug (3) is arranged between the two fastening plates (10); The plug (3) comprises an insert tube (13), one end of which is reduced in diameter, and a truncated cone-shaped rubber ring (14) is sleeved on the reduced diameter portion of the insert tube (13); one end of the insert tube (13) is inserted into the air outlet (2) through the rubber ring (14); the other end of the insert tube (13) is provided with a disc (15) matching the anti-detachment portion (11) on the outer ring; the disc (15) is placed on the inner side of the anti-detachment portion (11); the end of the fastening bolt (12) passes through the anti-detachment portion (11) and is pressed against the disc (15).

3. A liquid argon pump sealed gas source device according to claim 2, characterized in that: A plurality of push rods (16) are provided on the inner side walls of the two fastening plates (10), the ends of the push rods (16) are in an arc shape, and the ends of the push rods (16) are squeezed and half-wrapped on the surface of the insertion tube (13); A ring-shaped clamp (17) is provided on the outer side walls of the two fastening plates (10), and the clamp (17) is sleeved on the fastening plates (10).

4. A liquid argon pump sealed gas source device according to claim 3, characterized in that: A window (18) is provided in the middle of the two fastening plates (10), an extrusion plate (19) is passed through between the two windows (18), both ends of the extrusion plate (19) pass through the window (18) and extend toward the outer circle of one end of the fastening plate (10), a through hole (20) is provided in the middle of the extrusion plate (19), a plurality of slide grooves (21) are provided in the inner circle of the through hole (20), and a plurality of bayonet holes (22) are provided on the inner side wall of the extrusion plate (19); A plurality of blocks (23) are provided on the outer ring of one end of the insert tube (13). One end of the insert tube (13) is inserted into the air outlet (2) along the through hole (20). The blocks (23) slide into the inner wall of the extrusion plate (19) along the slide groove (21) and are rotated and embedded in the bayonet (22).

5. A liquid argon pump sealed gas source device according to claim 4, characterized in that: An extrusion ring (25) is threadedly connected to the outer ring of the reduced diameter portion of one end of the insertion tube (13); a ring body (26) is provided between the extrusion ring (25) and the rubber ring (14); and the extrusion ring (25) can squeeze the ring body (26) onto the rubber ring (14).

6. A liquid argon pump sealed gas source device according to claim 2, characterized in that: A pre-installed component is provided above the fastening unit, and the pre-installed component is used to pre-fix the fastening unit at the position of the air outlet (2), and the pre-installed component includes a clamp (27) made of elastic material, bolts are passed through both ends of the clamp (27), a vertical plate (28) is provided on the back of the clamp (27), the lower end of the vertical plate (28) is fixedly connected to a horizontal plate (29), and the lower surfaces of both ends of the horizontal plate (29) are provided with insertion rods (30), and the insertion rods (30) are inserted into sleeves (31) provided on the upper surface of the fastening plate (10).

7. A liquid argon pump sealed gas source device according to claim 6, characterized in that: The insertion rod (30) is rotatably connected to the transverse plate (29), and a protrusion (32) is provided at the end of the insertion rod (30); A sliding opening (33) is provided on the inner wall of the sleeve (31), the sliding opening (33) is provided along the axial direction of the sleeve (31), the protrusion (32) is embedded in the sliding opening (33), and the insertion rod (30) is inserted into the sleeve (31).

8. A liquid argon pump sealed gas source device according to claim 6, characterized in that: Notches (34) are provided on the upper edges of both ends of the clamp (27), and limiting blocks (35) are provided in the two notches (34). The limiting blocks (35) are used to limit the distance between the two ends of the clamp (27).

9. A liquid argon pump sealed gas source device according to claim 2, characterized in that: A plurality of fixing holes (36) are provided on the end surface of the disk body (15) opposite to the fastening bolts (12).

10. A liquid argon pump sealed gas source device according to claim 3, characterized in that: Adjusting bolts (37) are rotatably connected to both sides of the clamp (17), and ends of the adjusting bolts (37) penetrate into the inner side of the clamp (17) and are rotatably connected to an arc-shaped plate (38); Each of the arc-shaped plates (38) is provided with protrusions (39) on its upper and lower edges; The outer side walls of the other ends of the two fastening plates (10) are provided with guide grooves (40) symmetrically arranged in the upper and lower directions, and the ends of the guide grooves (40) are provided with recesses (41) adapted to fit the protrusions (39).

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